Radium Engineering Fuel Surge Tank Install Kit for Mitsubishi Evo X

Radium Fuel Surge Tank Install Kit - Mitsubishi Evo X

Application: Mitsubishi Lancer Evolution X (excluding RHD models with the OEM washer reservoir in the mounting location)
Part Type: Fuel surge tank installation kit (surge tank and fuel pump sold separately)
Part Number: 20-0113

This kit includes everything needed to install a Radium fuel surge tank (FST) with a single 39mm fuel pump in the Mitsubishi Lancer Evolution X. Radium FSTs are CNC-machined from aluminium, fully anodised, and use PTFE-insulated wiring and submersible hose for compatibility with alcohol fuels including ethanol, methanol and E85.

The FST mounts in a collision-safe location behind the rear seat and in front of the plastic panelling in the boot. The panel reinstalls after fitment, so 100% of usable boot space is retained. A powder-coated aluminium bracket bolts to the OEM mounting bosses with no drilling or cutting, and the pre-assembled, cut-to-length 6AN PTFE hoses integrate with the OEM fuel lines. Wiring uses flying leads and Raychem solderless butt splices, so no soldering is required and assembly takes less than 30 minutes.

Key Features

• Collision-Safe Location: FST mounts behind the rear seat with 100% of usable boot space retained
• No Drilling or Cutting: Powder-coated aluminium bracket bolts to OEM mounting bosses
• OEM Components Retained: The OEM battery and windscreen washer bottle stay in place
• Pre-Assembled PTFE Hoses: Cut to length, 6AN, non-permeable to eliminate fuel vapour odour in the cabin
• Durable Hose Construction: Anodised aluminium hose ends, stainless steel braid and black PVC cover for abrasion protection
• Solderless Wiring: Flying leads, Raychem butt splices and a weatherproof fuse and relay – under 30 minutes to assemble

What's Included

• Powder-coated aluminium mounting bracket
• Pre-assembled, cut-to-length 3/8" (6AN) PTFE hoses with anodised aluminium hose ends
• AN and OEM-style adapter fittings
• Stainless steel hardware
• Wiring components with flying leads, Raychem solderless butt splices, and a weatherproof fuse and relay for the FST pump
• Installation instructions

Optional Parts

• Radium Standard Single Pump FST Fuel Surge Tank (20-0960) – the single-pump surge tank this kit installs (required, sold separately)
• Radium Fuel Pump Hanger - Mitsubishi Evo X (20-1642) – recommended by Radium to reduce the OEM return port restriction, with a higher-flowing venturi jet pump

Important Notes

• The fuel surge tank and fuel pump are not included and must be purchased separately
• Not compatible with RHD models that have the OEM windscreen washer reservoir in the mounting location – check your reservoir before ordering
• Plumbing and wiring are designed for a single pump – a dual-pump FST requires a Radium DIY harness and a second hose from the FST to the fuel rail
• When using a Radium FST-R, the kit reuses the OEM fuel pressure regulator: one hose is not used, the OEM 1/4" FPR return hose must be removed, drained or plugged, and the FPR vacuum hose must be extended to the boot
• The OEM fuel pump housing has a restrictive return port, so slightly elevated static fuel pressure is normal with a high-flow pump – the return port can be enlarged as described in the instructions
• Depending on the surge tank pump flow rate, a main tank pump upgrade may be needed – as an estimate, the main tank pump should flow roughly 40-50% of the surge tank pump
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Mitsubishi Lancer Evolution X (excluding RHD models with the OEM washer reservoir in the mounting location)

If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.

Installation

We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.

Note

Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.